Improvement in tuyeres



timidi hm PETER SWEENY, 0E NEW YORILYN.' Y.

Letters Patent No. 112,192, am@ February 28, 1871.

IMPROVEMENT IN TUVERES.

The Schedule referred to in these Letters Patent and making part ofthe seme.

To all whom 'it 'may concern Y Be it known that I, PETER SWEENY, of the city, county, and State of New York, have invented certain Improvements in Tuyeres for preventing the cn trance cf the gases from the fire in forges into the air-pipe leading from the bellows or fan to the lire, of which the following is a specitication, reference being had to the accompanying drawing forming a parl thereof.

My invention consists in placing in the tuycre o1 air-pipe leading from the bellows or other blowing device to the lire in forges, furnaces, 85o., a valve so constructed and arranged that while it permits the air to pass without obstruction from the bellows to the lire, it prevents the return of any air or'gas from the forge o1' fire through the air-pipe toward the bellows, causing such air or gas to be discharged through a separate pipe into the smoke-stack or into the open au'.

' A is the air-pipe leading from the bellows or fan toward the forge. Y

B is the valve-pipe into which the pipe A opens.

C is a pipe leading from the valve-pipe to the forge.

D is the valve arranged within the valve-pipe B. This valve may be made' in any form desired.

A hollow light metal sphere cr half-sphere, or a valve made in the shape shown in the drawing, will be found suitable. It may be placed and allowed to slide upon a rod, a, in the center of the pipe B, extending from cud to end.

E is a valve-seat, against which the valveI closes the communication between the pipes A and C.

F is a valve-seat, against which the valve closes the communication between the pipes G and C;

G is a pipo leading from the valve-pipe B into the smoke-stack.

H is a portion of the forge.

The valve-pipe is to be placed in a vertical position, or so nearly so, that the valve D, when the air is at rest in the pipe B, will fall of its own weight upon the seat E.

It is evident that when a current of air is drawn through the pipe A thevalve D will be thereby forced and held up against the valve-seat F, thus closing the pipe G and allowing the air to pass freely through the pipe G to the forge H, and that when the movement of the air ceases the valve D will fall down upon the valve-seat E, closing all communication between the fire in the forge and the pipe A leading from the bellows, and opening the pipe G leading to the smokestack.

When, therefore, the blast is on, the air passes freely from the bellows to the re, not being permitted to escape elsewhere. But as soon as the blast ceases, the communication between the re and the bellows being closed, and `the communication between the nre and the smoke-stack, through the pipes (l and G, being open, the gases from the re, if they are forced back through the pipe C, cannot enter the pipe A, but will escape through the pipe G into the smoke-stack.

By these means all danger resulting from the escape of indammatory and explosive gases from the fire of forges into the, bellows or pipes leading thereto, is obviated.

Y What I claim as my invention, and desire to secure by Letters Patent, is-

The pipes A, B, O, and G with the valve D, combined and arranged substantially as and for the purpose described.

PETER SWEENY. Witnesses:

A. F. FITCH, GEO. GOTT. 

